Tags: Shel from show and off with Ted add HelpIn 12c, Oracle introduced the History command, which is much like the history in the Shell, reducing the knock-down of SQL and bringing a lot of convenience.1. View the history HelpSql> HelpHistory-------Stores, lists, executes, edits of the commandsEntered during the current Sql*plus session.Hist[ory] [N {RUN | EDIT | Del[ete]}] | [CLEAR]N is the entry number l
using the temporary tablespace 22.8 summary
Chapter 23rd pluggable Databases23.1 Understanding Pluggable Architecture23.1.1 Conversion Paradigm23.1.2 the meaning of backup and recovery operations23.1.3 Fine Tuning23.2 Creating a CDB23.2.1 creating a CDB manually using SQL commands23.2.2 using DBCA23.2.3 creating a CDB script from DBCA23.2.4 Check if the CDB has been created23.3 Managing the root container23.3.1 Connecting the root container23.3.2 displaying information for the current conn
#!/bin/bash# #oracle: Start/stop Oracle Database 11g r2/12c## chkconfig:345 - Ten# description:the Oracle Database Server is a RDBMS created by Oracle corporation## processname:oracle./etc/rc.d/init.d/Functionslockfile=/var/lock/subsys/Oraclepath= $PATH: $HOME/Binoracle_use
New Features of Oracle 12C-online migration of table partitions or subpartitions
Oracle 12c: new feature-online migration of table partitions or subpartitions. It is no longer necessary to migrate table partitions or subpartitions to different tablespaces in Oracle
I used to have an idea that I just wanted to create an index on one or a few of these partitions, and that the other partitions didn't want to be created, and neither the local nor global index was able to achieve that requirement, but the partial Global was introduced from Oracle 12C /local Indexes for partitioned tables solves the problem by creating a local index or global index on the specified partitio
move datafile '/u01/app/oracle/oradata/cdb/pdb/pdb_users01.dbf ' to '/u01/app/pdb_user01.dbf ';Database altered.Sql> Select Name,status from V$datafile where file#=10;NAME STATUS-------------------------------------------------------------------------------- -------/U01/APP/PDB_USER01.DBF ONLINESuccess!Summary: Although Oracle 12c log files are shared, CDB and e
Label:In 12C, when a column is defined as "invisible," the SQL statement without direct access to the column is unable to see the "invisible column", and the statement that explicitly references the "invisible column" can access and manipulate the column. When creating table, create VIEW, ALTER VIEW, ALTER TABLE, you can create an invisible column. For example, the following scenario is not available for "invisible columns": • Use wildcard statements
The company installs an Oracle 12c test environment, is ready to export the online library to test performance, the results of the test library of the character set selected Al32utf8, a look at the line is ZHS16GBK, or to maintain the same, and then record Al32utf8 ZHS16GBK character Set process:
first, the most important thing: backup. Back up your data. Don't forget to back up your data.
C:\windows\syst
Tags: MoS unique oracl product Memory server app not strEnvironment is 12.2.0.1 version, Oracle Data guard Main Library patrol found alert with abnormal error: 2018-07-10t13:24:04.710366+08:00Errors in FILE/U01/APP/ORACLE/DIAG/RDBMS/DWDB/DWDB1/TRACE/DWDB1_M000_4455.TRC:Ora-00245:control file backup failed; In Oracle RAC, Target might not is on shared storageRemov
Oracle 12c In-Memory
Oracle introduced the In-Memory and columnar compression option In 12c, which greatly improves query performance.
Here, we can see how much performance can be improved in the same query through a comparison.
1. allocate Memory to In-Memory firstSQL> show parameter inmemory;NAME TYPE VALUE----------
The new features of In-database archiving are introduced in Oracle Database 12c, which allows users to archive data by marking data rows on the table as inactive inactive. These inactive data rows can be compressed into one optimization and are not visible to the app by default. This feature enables the functionality and requirements of this "tag delete" in the case of minimal changes to existing code.Befor
/database/install. /stage/components/oracle.ctx/12.1.0.2.0/1/datafiles/filegroup15.26.1.jar
Similar to a total of 5 files can not find an error
(3) 69% when the error is as follows:
File not found C:\oracle\product\12.1.0\dbhome_1\demo\schema\mk_dir.sql.sbs error
2.2 69% When the card stops working
The above error is ignored, in the 69% state of the "Update registry" Hkey_local_machine/software/
Tag:tabreadossmanage copy optionsonslinebase $ Sqlplus '/as sysdba ' sql*plus:release 12.1.0.1.0 Production on Tue June 13:03:06 2015Copyright (c) 1982, Oracle. All rights reserved. Connected to:oracle Database 12c Enterprise Edition Release 12.1.0.1.0-64bit productionwith The partitioning, OLAP, Adva nced Analytics and Real application testing optionssql> show Con_name; Con_name---------------------------
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